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《Journal of Xi'an Jiaotong University》 2018-09
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Pressure Recovery of V-Cone Flowmeter Under High Gas Volume Fraction

HE Denghui;BAI Bofeng;State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi'an University of Technology;State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University;  
The gas-liquid distribution in the V-Cone flowmeter and the effect of the distribution on the downstream pressure recovery of V-Cone under high gas volume fraction were experimentally investigated.The effects of inlet flow patterns and equivalent diameter ratio of the V-Cone flowmeter on the gas-liquid distribution were explored.The pressure recovery length of the V-Cone flowmeter at different equivalent diameter ratio was obtained.The results show that the flow pattern may be changed when flowing through the V-Cone,and the diameter ratio significantly affects the downstream flow pattern of the V-Cone.The pressure distribution along the flow direction is closely related to the flow pattern.It is found that the pressure recovery length of the V-Cone flowmeter for gas-liquid flow is shorter than that for single-phase fluid.The pressure recovery length of the V-Cone flowmeter with a diameter ratio of 0.45 at high gas volume fraction is less than 6 D,and the pressure can be recovered at the position of 3 D downstream of V-Cone under certain conditions.For the V-Cone flowmeters with the diameter ratios of 0.55,0.65 and 0.75,the pressure can be recovered at the position of 3 Ddownstream of V-Cone.This study may provide a guide to the development of a method for measuring gas and liquid flow rates online by a V-Cone throttle device.
【Fund】: 国家自然科学基金资助项目(51709227);; 陕西省教育厅2016年度专项科学研究计划资助项目(16JK1556)
【CateGory Index】: TH814
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